Magnetic Field vs. Time The magnetic field through a single loop of wire 18.7 cm in radius and of 8.55 Ω resistance, changes with time as shown in the figure above. The uniform magnetic field is perpendicular to the plane of the loop. Calculate the magnitude of the EMF in the loop as a function of time in each of the following time intervals: (a) t = 0 to t = 2.0 s